
.border-bottom(){
    &{
        position: relative;
    }
    &::after{
        content:"";
        display: block;
        width: 100%;
        height: 1PX;
        position: absolute;
        left:0;
        bottom:0;
        background: #f7f7f7;
    }
}
.line{
    .border-bottom();
}
.text-over-hidden(@a) when(@a=1){
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.text-over-hidden(@a) when(@a>1){
    overflow : hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: @a;
    -webkit-box-orient: vertical;
}